Add `sync patterns` into docs where reusable block(s) are mentioned

[oglekler]

During 6.3, ​reusable blocks were renamed to synced patterns:

WordPress 6.3 renamed Reusable Blocks to Patterns. A synced pattern will behave in exactly the same way as a reusable block.

It looks like we need to have both names alongside in the code docs because we have reusable and block in many places in code and file naming, and it is unnecessary to rename them all, but need to make clear that they are the same thing now.

This adds comments in the docs that patterns and reusable blocks are the same, that patterns is new since 6.3.0.

Trac ticket: https://core.trac.wordpress.org/ticket/59388

[nicolefurlan]

This ticket was discussed in today's bug scrub.

The About page copy review should happen first. Then those changes can be used in the code doc changes. Then the PR can be updated and Core contributors or committers can review those changes.

I've dropped this ticket into #core-docs so that we can get some eyes on it.

Props to @hellofromTonya :)

[hellofromTonya]

The user facing copy has been reviewed. Marking this ticket for commit.

Note: The @since notes need review, which the committer can do.

If we had time, I would make some copy changes for clarity in line 71 of about.php, but this is not the time. So, officially, LGTM

@marybaum What changes would you make? I don't mind opening it in another PR if you want

Two things:

1. I would change the phrase 'previously referred to as reusable blocks' to 'formerly reusable blocks' or 'formerly called reusable blocks'

2. I would change this —

'WordPress 6.3 brings your content, templates, and patterns together in the Site Editor for the first time. Add pages, browse style variations, create synced patterns (previously referred to as “reusable blocks”), and enjoy fine-tuned control over your navigation menus. No more time wasted switching across different site areas—now you can focus on what matters most. Creation to completion, all in one place.' )

to this —

'For the first time ever, WordPress pulls all your tools together. Because now your content, templates, and patterns live in the Site Editor, at your fingertips, ready to help you add pages, consider style variations, build synced patterns (what you used to call 'reusable blocks')' and fine-tune your menus. Starting right now, never spend another second switching from one part of your site to another. Instead, focus on what matters most: concept to complete, in one fluid process, in one convenient place.'

Nothing like pumping extra drama into copy so people can see themselves as the star of the show! Also, we don't need to say 'navigation menus'—one word implies the other. Use as much or as little of this as you like!

[hellofromTonya]

​Changes requested in the patch. Also noting the changes are for code docs only.

I would change the phrase 'previously referred to as reusable blocks' to 'formerly reusable blocks' or 'formerly called reusable blocks'

@marybaum I took your suggestion and updated the comments through the PR to read 'formerly called reusable blocks'

@hellofromtonya How does this look?

[rajinsharwar]

I guess this looks good and could be committed before the RC3 (As it's already postponed)

[SergeyBiryukov]

In 57032:

Docs: Update some reusable block references to synced patterns.

In WordPress 6.3, ​Reusable Blocks were renamed to Patterns. A synced pattern will behave in exactly the same way as a reusable block.

This commit updates some references in DocBlocks and inline comments to use the new name.

Follow-up to [56030].

Props benjaminknox, oglekler, hellofromTonya, marybaum, nicolefurlan.
Fixes #59388.

Thanks for the PR! I think we can keep the "(formerly called reusable blocks)" wording in some top-level DocBlocks, but inline comments and unit tests can just use the new name directly.

Merged in r57032 with some adjustments to avoid redundancy.

[SergeyBiryukov]

Reopening for backporting to the 6.4 branch after a second committer's review.

[SergeyBiryukov]

In 57033:

Coding Standards: Remove extra space in a comment in WP_REST_Blocks_Controller.

This fixes a WPCS error: Whitespace found at end of line.

Follow-up to [57032].

Props hellofromTonya.
See #59388.

[hellofromTonya]

[57032] and [57033] are okay for backport to 6.3 and 6.4 branches.

[SergeyBiryukov]

In 57040:

Docs: Update some reusable block references to synced patterns.

In WordPress 6.3, ​Reusable Blocks were renamed to Patterns. A synced pattern will behave in exactly the same way as a reusable block.

This commit updates some references in DocBlocks and inline comments to use the new name.

Follow-up to [56030].

Reviewed by hellofromTonya.
Merges [57032] and [57033] to the 6.4 branch.

Props benjaminknox, oglekler, hellofromTonya, marybaum, nicolefurlan.
Fixes #59388.

[SergeyBiryukov]

In 57041:

Docs: Update some reusable block references to synced patterns.

In WordPress 6.3, ​Reusable Blocks were renamed to Patterns. A synced pattern will behave in exactly the same way as a reusable block.

This commit updates some references in DocBlocks and inline comments to use the new name.

Follow-up to [56030].

Reviewed by hellofromTonya.
Merges [57032] and [57033] to the 6.3 branch.

Props benjaminknox, oglekler, hellofromTonya, marybaum, nicolefurlan.
Fixes #59388.